Intermintent Engine dying.

[dvst8r]

Well I had a new one today, I was hard on it was at about 40psi, and the engine died, it was like some one just shut off the key. Pump the peddle nothing at all, coast for a bit and then bam! Back to normal.

Now I cruised the whole way home approx 20miles, and as long as I didn't stand on it the truck ran fine, but if I did the boost would come up, sometimes to 20psi, sometimes to 45psi, sometimes in between and then it would happen again. It is all mechanical so I have no idea what is causing this cut out.

Help!!!

[pulltilbroke]

Check the wire on the fuel shutoff solenoid

[Ace]

Try replacing the fuel filter...

[NYCEGUY01]

Mine did that 3 or 4 times. Then the inj pump gave up. A new pump was the ultimate fix.

[dpuckett]

I'll second the checking of the shut off solenoid connection. I had one die on my a mile from home. I walked back to the house, got my (now ex) fiancee, and we took the tractor down, got the truck turned around, and back home. I got to looking, and the shut off solenoid had come unplugged. They are just a 1/4" female blade conector with a plastic cover, nothing fancy. The wiring can get shredded and thin, making for a poor connection.

If that isnt the problem, you are likely looking at a rebuild. You DO have a fuel pressure gauge between the filter and IP, dont you? I can draw mine down to almost nothing with only 32psi boost.

Daniel

[dvst8r]

No fuel pressure gauge, but I will get one this weekend.

Haven't had any time to really look at it yet, but while I was driving it this morning here are a couple of other observations:

- Has nothing to do with rpm, I slowly in 3rd gear brought it right up to the gov, and it was fine.

-It appears to be heavy load related, as when I was pulling a big hill today, even though I was easing into it it cut. Or if I just stomp on it, from any point.

-Finally power seams to be restored as soon as you push the clutch in, and let it back out, even if you leave it in the same gear...???? Or if you just leave it in that gear and coast for 5-15 seconds...

I picked up a new fuel filter, so as soon as I pound out this paper work tonight I will try and get that put on, the connection to the fuel stop solonoid seemed to be fine, but I will clean it and change the connector anyway.

One last thing in case I didn't mention this before, it was running just fine, on Saturday, in fact I raced my friend in his 7.3L Superduty with and edge box on kill, and rolled him with no problem even with the 40's on the truck. He was so impressed he got me to take his friend for a ride, and when I hit 4th gear that time it did the cut for the first time. At least it is just a play truck, we will get this sorted out eventually.

[SNOOT]

YES YES AND YES Check the two wires on the pump mine did this when ever I did 360's all the time.

http://www.youtube.com/watch?v=tI2hSPC6fO0

[dvst8r]

I only have one wire on my pump??? Oh and one on the KSB (I think that is what it is called)

[dvst8r]

Update time!

Good news and Bad news.

Good news:

I changed my fuel filter, same thing. Changed and cleaned the connectors on the stop solenoid Golden! Just like everyone predicted.

Bad news:

I hit 50psi on stock sticks with my hx35.12, and blew the HG... It is not mixing oil and coolant, either in the rad, or in the oil pan, but I am now leaking a fair bit of oil out under the exhaust manifold, looks like between head and block...

More new questions:

Are Custom AGE 625 studs worth the extra money?

What head gasket should I buy?
-Haisley machine has a gasket and mild steel fire rings for $225, I was going to have the head ported, and o-ringed when I popped the gasket, but I was expecting to at least get the twins on before that happened. Anyway don't have the time to do that right now. Should I just get a stock gasket and pull it apart again later or do the $225 and call it good?

[dpuckett]

How far are you planning to go? The only stock replacement option now is the marine grade gasket, so you should be ok to the mid 40s at least. It is a lot stouter than your OEM head gasket from 1990. Get it fire ringed, o-ringed, and the whole works.....

DP

[dvst8r]

500 - 550 whp is the plan at this point. Once that is reached we will take a look and go from there.

I really want to take the time to pull the head and machine off the intake, have it fully ported and o-ringed put the studs in, and have it ready for the gt42, and sticks, but I don't want to leave it in Abbotsford, (8hrs from where I am) and I don't know if I can take enough time to wait for it to be done.

I think for right now, I will just get standard arp studs. A marine gasket (any links to part numbers?) and hope she holds the 45 - 50psi that the stock sticks seem to be pushing out of this hx35. If it blows again with the twins, I will just park it for the time being, or if it lasts till this winter, then I will tear it down and get it all done.

[gharger]

Assuming you are still non ic'd, what egt are you seeing? My '89 about pegs the 1500 gauge...stock sticks and turbo at 28psi.

[dvst8r]

I can peg the 1800 degree gauge I have if I stay in it.

edit, yet it is still non ic'd